[Spaceships] Paying more for better system?

[Sorenant]

Thanks you all for the replies, I'm a little short on time today but tomorrow I'll have more time to read and consider all these suggestions more carefully to give a proper feedback.
Skimming through it, I particularly like ericbsmith's idea, using standard reactionless drive while cruising to avoid being detected by hostiles and switching to hot when the fight starts seems to be a great advantage.
I wanted the 4th book for the fighters and mechas but apparently I should get 7 next. I wish SJGames sold their lines in bundles with discount.